问题
选择题
If it _____ now, we _____ not go out. |
A. rained; will B. rained; would C. rains; would D. rain; should |
答案
答案:B
If it _____ now, we _____ not go out. |
A. rained; will B. rained; would C. rains; would D. rain; should |
答案:B
(12分)将Zn棒和Cu棒用导线连接后,放入某电解质溶液中,构成如右下图所示装置。试回答下列问题:
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(2)若电解质为硫酸铜溶液,则Cu棒上发生 反应,Zn棒上发生反应的电极反应式为: 。
(3)若在上述两个过程中,Zn棒减少的质量相等,则Cu棒上(1)和(2)所析出物质的质量之比为: 。